Priming a ship modelkit with Gunze Mr. Surfacer. But why is she spraying against the wall, that she covered with a paper, why not in a direction where the residual spray doesn't hit anything, like I do?

sanitaeter said:

Priming a ship modelkit with Gunze Mr. Surfacer. But why is she spraying against the wall, that she covered with a paper, why not in a direction where the residual spray doesn't hit anything, like I do?

Spraying into "nothingness" makes the primer particles spread around and they still may hit unintended target: something or someone. Spraying them onto a surface makes them all hit an intended target. It's how you never shoot your gun in the air, if you absolutely have to discharge, aim at the ground.